创建返回self mock的mock和stub方法

Question

我有一个如下的类：

class Foo extends BaseObject {

    public static function grab() {
        // do some DB search and return an instance of self
        // with the data in the object
        return new Foo($id);
    }

    public function insert() {
        // insert the data in the database for this object
        return false;
    }

    public function delete() {
        // delete the data from the database for this object
        return false;
    }

}

我如何模拟这个对象，同时仍然能够断言对insert和delete的调用按预期运行？

我所做的是：use AspectMock\Test;

    $mock = Test::double('Foo', [
        'grab' => Stub::make('Foo'),
        'insert' => true,
        'delete' => true,
    ]);

    // ... later in the test ...

    self::assertSame($foo->insert(), true);

    $mock->verifyInvoked('insert', 1);

这将绕过insert和update方法的模拟，返回false而不是预期的true。它也没有像预期的那样计算调用次数。

那么我怎样才能让mock自动返回呢？

(请原谅我在mock和stub之间造成的任何混淆)

Answer 1

我建议您使用Phake来模拟静态方法as described here in the doc，例如：

public function testInsert()
{
    /** @var \App\Foo $classUnderTest */
    $classUnderTest = $this->getMockBuilder(Foo::class)
        ->disableOriginalConstructor()
        ->onlyMethods(['insert'])
        ->getMock();

    $classUnderTest->expects($this->once())
        ->method('insert')
        ->willReturn(true);

    /** @var \App\Foo $fooGrab */
    $fooGrab = \Phake::mock(Foo::class);
    \Phake::whenStatic($fooGrab)
        ->grab()
        ->thenReturn($classUnderTest);

    $mock = $fooGrab::grab();

    $this->assertTrue($mock->insert());
}